4th commit adding of Unix Shell assignments

Assignment_1.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+echo -n "Enter your directory: "
+read -r x
+du -sh "$x"

Assignment_10.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+echo -n "Enter The Number: "
+read -r n
+if [ $((n % 2)) -eq 0 ]; then
+	echo "is a Even Number"
+else
+	echo "is a Odd Number"
+fi

Assignment_11.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+echo -n "Enter A Number: "
+read -r n
+arm=0
+temp=$n
+while [ "$n" -ne 0 ]; do
+	r=$((n % 10))
+	arm=$((arm + r * r * r))
+	n=$((n / 10))
+done
+echo $arm
+if [ $arm -eq "$temp" ]; then
+	echo "Armstrong"
+else
+	echo "Not Armstrong"
+fi

Assignment_12.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+echo -n "Enter Any Number: "
+read -r n
+i=1; c=1
+while [ $i -le "$n" ]; do
+	i=$((i + 1))
+	r=$((n % i))
+	[ $r -eq 0 ] && c=$((c + 1))
+done
+
+if [ $c -eq 2 ]; then
+	echo "Prime"
+else
+	echo "Not Prime"
+fi

Assignment_13.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+x=0; y=1; i=2
+while true; do
+	i=$((i + 1))
+	z=$((x + y))
+	echo -n "$z "
+	x=$y
+	y=$z
+	sleep .5
+done

Assignment_14.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+for ((i = 32; i >= 0; i--)); do
+	r=$((2 ** i))
+	Probablity+=($r)
+done
+
+[[ $# -eq 0 ]] && {
+	echo -e "Usage \n \t $0 numbers"
+	exit 1
+}
+
+echo -en "Decimal\t\tBinary\n"
+for input_int; do
+	s=0
+	test ${#input_int} -gt 11 && {
+		echo "Support Upto 10 Digit number :: skiping \"$input_int\""
+		continue
+	}
+
+	printf "%-10s\t" "$input_int"
+
+	for n in ${Probablity[@]}; do
+
+		if [[ $input_int -lt $n ]]; then
+			[[ $s == 1 ]] && printf "%d" 0
+		else
+			echo -n 1
+			s=1
+			input_int=$((input_int - n))
+		fi
+	done
+	echo -e
+done

Assignment_15.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+#
+# Author: Abhishek Shingane (abhisheks@iitbhilai.ac.in)
+# Date: 11 Sep 2020
+#
+
+if ! [ -x "$(command -v jq)" ]; then
+  echo 'Error: jq is not installed. Install via https://stedolan.github.io/jq/download/'
+  exit 1
+fi
+
+if [[ $# -ne 1 ]]; then
+	echo 'Provide I.P as command line parameter. Usage:  ' $0 ' 15.45.0.1 '
+	exit 1
+fi
+link=$(echo "http://ip-api.com/json/"$1)
+data=$(curl $link -s) # -s for slient output
+
+status=$(echo $data | jq '.status' -r)
+
+if [[ $status == "success" ]]; then
+
+	city=$(echo $data | jq '.city' -r)
+	regionName=$(echo $data | jq '.regionName' -r)
+	country=$( echo $data | jq '.country' -r)
+	echo $city, $regionName in $country. 
+fi 

Assignment_16.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+name=$1
+path=$2
+tar -czvf "$name.tar.gz" "$path"
+gpg -c "$name.tar.gz"
+rm -rf "$name.tar.gz"

Assignment_17.sh

@@ -0,0 +1,23 @@
+
+#!/bin/bash
+#
+# Linux Shell Scripting Tutorial 1.05r3, Summer-2002
+#
+# Written by Vivek G. Gite <vivek@nixcraft.com>
+#
+# Latest version can be found at www.nixcraft.com/
+#
+# Q1.Script to sum to nos
+#
+
+if [ $# -ne 2 ]
+then
+echo “Usage – $0 x y”
+echo ” Where x and y are two nos for which I will print sum”
+exit 1
+fi
+echo “Sum of $1 and $2 is `expr $1 + $2`”
+#
+# ./ch.sh: vivek-tech.com to nixcraft.com referance converted using this tool
+# See the tool at www.nixcraft.com/uniqlinuxfeatures/tools/
+#

Assignment_18.sh

@@ -0,0 +1,12 @@
+# scmuser created the topic: how to restore the dump file using shell scripting
+
+# I have created a script file to dump the application files using the following script
+
+# Code
+#  =============
+#!/bin/bash
+
+
+now=$(date +”%d-%m-%Y”)
+#use 1 instead of 0 which is incremental backup
+dump -0f $now /var/www/html/*

Assignment_2.sh

@@ -0,0 +1,53 @@
+#!/bin/bash
+# test-file: Evaluate the status of a file
+echo "Hey what's the File/Directory name (using the absolute path)?"
+read FILE
+
+if [ -e "$FILE" ]; then
+	if [ -f "$FILE" ]; then
+		echo "$FILE is a regular file."
+	fi
+	if [ -d "$FILE" ]; then
+		echo "$FILE is a directory."
+	fi
+	if [ -r "$FILE" ]; then
+		echo "$FILE is readable."
+	fi
+	if [ -w "$FILE" ]; then
+		echo "$FILE is writable."
+	fi
+	if [ -x "$FILE" ]; then
+		echo "$FILE is executable/searchable."
+	fi
+else
+	echo "$FILE does not exist"
+	exit 1
+fi
+exit
+
+
+
+#!/bin/bash
+
+# Program to check the status of a file
+
+echo -n "Enter the file directory"
+read -r File
+
+if [ -e "$FILE" ]; then
+	if [-f $FILE]; then
+	echo "$FILE is a regular file"
+	if
+	if [ -r $FILE ]; then
+	echo "$FILE is a readable file"
+	if
+	if [ -d $FILE ]; then
+	echo "$FILE is a directory"
+	if
+else
+	echo "$FILE is not available "
+	exit 1
+fi
+exit 
+
+

Assignment_3.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+date
+echo "uptime:"
+uptime
+echo "Currently connected:"
+w
+echo "--------------------"
+echo "Last logins:"
+last -a | head -3
+echo "--------------------"
+echo "Disk and memory usage:"
+df -h | xargs | awk '{print "Free/total disk: " $11 " / " $9}'
+free -m | xargs | awk '{print "Free/total memory: " $17 " / " $8 " MB"}'
+echo "--------------------"
+start_log=$(head -1 /var/log/messages | cut -c 1-12)
+oom=$(grep -ci kill /var/log/messages)
+echo -n "OOM errors since $start_log :" $oom
+echo ""
+echo "--------------------"
+echo "Utilization and most expensive processes:"
+top -b | head -3
+echo
+top -b | head -10 | tail -4
+echo "--------------------"
+echo "Open TCP ports:"
+nmap -p -T4 127.0.0.1
+echo "--------------------"
+echo "Current connections:"
+ss -s
+echo "--------------------"
+echo "processes:"
+ps auxf --width=200
+echo "--------------------"
+echo "vmstat:"
+vmstat 1 5

Assignment_4.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+MAX=95
+EMAIL=server@127.0.0.1
+
+# Calculate CPU usage and round to the nearest integer
+USE=$(grep 'cpu ' /proc/stat | awk '{usage=($2+$4)*100/($2+$4+$5)} END {printf "%.0f", usage}')
+
+# Debug statement to print the calculated CPU usage
+echo "Calculated CPU Usage: $USE"
+
+# Compare the integer value with the maximum threshold
+if [ "$USE" -gt "$MAX" ]; then
+    echo "Percent used: $USE" | mail -s "Running out of CPU power" "$EMAIL"
+    echo "Email sent."
+else
+    echo "CPU usage below threshold."
+fi

Assignment_5.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+MAX=95
+EMAIL=server@127.0.0.1
+PART=sda1
+
+# Extract the usage percentage, making sure to handle the case where the partition is not found
+DF_OUTPUT=$(df -h)
+USE=$(echo "$DF_OUTPUT" | awk -v part="$PART" '$NF==part {print $(NF-1)}' | sed 's/%//')
+
+# Debug statement to print the actual output of the df command
+echo "df output:"
+echo "$DF_OUTPUT"
+
+# Check if USE is a valid number
+if [[ "$USE" =~ ^[0-9]+$ ]]; then
+    # Compare the integer value with the maximum threshold
+    if [ "$USE" -gt "$MAX" ]; then
+        echo "Percent used: $USE" | mail -s "Running out of disk space" "$EMAIL"
+    fi
+
+fi